/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #F5F7FA;
  --bg-card: #FFFFFF;
  --text-primary: #222222;
  --text-secondary: #666666;
  --btn-create: #3390EC;
  --btn-cancel: #E94E3C;
  --accent: #4AB3F4;
  --shadow: rgba(0, 0, 0, 0.1);
  --border-radius: 16px;
  --spacing: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* User Top Bar */
.user-bar {
  display: flex;
  align-items: center;
  padding: 12px var(--spacing);
  background-color: var(--bg-card);
  box-shadow: 0 2px 8px var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--btn-create), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: white;
  margin-right: 12px;
  flex-shrink: 0;
}

.user-info {
  flex: 1;
}

.user-name {
  font-weight: 600;
  font-size: 16px;
  color: var(--text-primary);
}

/* Container */
.container {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--spacing);
}

/* Page Title */
.page-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin: 24px 0;
  color: var(--text-primary);
}

/* Main Tabs */
.tabs-container {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  padding: 0 var(--spacing);
  border-bottom: 2px solid #f0f0f0;
}

.tab-btn {
  flex: 1;
  padding: 12px 20px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all 0.2s;
  position: relative;
  margin-bottom: -2px;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--btn-create);
  border-bottom-color: var(--btn-create);
}

/* Create Event Button */
.btn-create {
  width: 100%;
  padding: 16px 24px;
  background: var(--btn-create);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  font-size: 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 12px rgba(51, 144, 236, 0.3);
  margin-bottom: 24px;
}

.btn-create:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(51, 144, 236, 0.4);
}

.btn-create:active {
  transform: translateY(0);
}

.btn-icon {
  font-size: 24px;
  line-height: 1;
}

/* Categories Container */
.categories-container {
  margin-top: 24px;
  margin-bottom: 20px;
}

.categories-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.categories-list::-webkit-scrollbar {
  display: none;
}

.category-btn {
  padding: 10px 20px;
  border: 2px solid #e0e0e0;
  border-radius: 20px;
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
  flex-shrink: 0;
}

.category-btn:hover {
  border-color: var(--btn-create);
  transform: translateY(-1px);
}

.category-btn.active {
  background: var(--btn-create);
  color: white;
  border-color: var(--btn-create);
}

/* Events Container */
.events-container {
  margin-top: 24px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-secondary);
}

.empty-icon {
  font-size: 64px;
  margin-bottom: 16px;
}

.empty-state p {
  font-size: 18px;
  margin-bottom: 8px;
}

.empty-hint {
  font-size: 14px;
  color: #999;
}

/* Events List */
.events-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Event Card */
.event-card {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 20px;
  box-shadow: 0 2px 8px var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.event-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--shadow);
}

.event-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
  gap: 12px;
}

.event-card-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
}

.like-btn {
  background: transparent;
  border: 2px solid #e0e0e0;
  border-radius: 20px;
  padding: 6px 12px;
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
  color: var(--text-secondary);
}

.like-btn:hover {
  border-color: #ff6b35;
  transform: scale(1.05);
  background: rgba(255, 107, 53, 0.05);
}

.like-btn.liked {
  border-color: #ff6b35;
  background: rgba(255, 107, 53, 0.1);
  animation: likeAnimation 0.3s ease;
}

@keyframes likeAnimation {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
  }
}

.likes-count {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  min-width: 16px;
}

.like-btn.liked .likes-count {
  color: #ff6b35;
}

.event-card-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.event-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.event-meta-icon {
  font-size: 16px;
}

.event-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid #f0f0f0;
}

.event-participants {
  font-size: 14px;
  color: var(--text-secondary);
}

.event-participants strong {
  color: var(--text-primary);
}

.btn-open {
  background: transparent;
  border: 2px solid var(--btn-create);
  color: var(--btn-create);
  padding: 8px 20px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-open:hover {
  background: var(--btn-create);
  color: white;
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--spacing);
  backdrop-filter: blur(4px);
}

.modal-content {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid #f0f0f0;
}

.modal-header h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  font-size: 28px;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background 0.2s;
}

.modal-close:hover {
  background: #f0f0f0;
}

/* Event Form */
.event-form {
  padding: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e0e0e0;
  border-radius: 12px;
  font-size: 16px;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-card);
  transition: border-color 0.2s;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.form-group select:focus {
  outline: none;
  border-color: var(--btn-create);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--btn-create);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #999;
}

.form-hint {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

/* Buttons */
.btn {
  flex: 1;
  padding: 14px 24px;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--btn-create);
  color: white;
}

.btn-primary:hover {
  background: #2a7fd4;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(51, 144, 236, 0.3);
}

.btn-secondary {
  background: #f0f0f0;
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: #e0e0e0;
}

.btn-danger {
  background: var(--btn-cancel);
  color: white;
}

.btn-danger:hover {
  background: #d43d2c;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(233, 78, 60, 0.3);
}

.btn-chat {
  background: var(--accent);
  color: white;
  width: 100%;
}

.btn-chat:hover {
  background: #3a9fe0;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(74, 179, 244, 0.3);
}

/* Event Detail */
.event-detail {
  padding: 20px;
}

.detail-section {
  margin-bottom: 24px;
}

.detail-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.detail-text {
  font-size: 16px;
  color: var(--text-primary);
  line-height: 1.6;
}

.detail-actions {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid #f0f0f0;
}

.detail-actions .btn {
  width: 100%;
}

/* Owner Actions */
.owner-actions {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 2px solid #f0f0f0;
}

.participants-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}

.participant-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-primary);
  border-radius: 12px;
}

.participant-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--btn-create));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
  color: white;
  flex-shrink: 0;
}

.participant-name {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
}

.owner-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.owner-buttons .btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.owner-hint {
  margin-top: 16px;
  padding: 12px;
  background: #FFF9E6;
  border-left: 3px solid #FFD700;
  border-radius: 8px;
  font-size: 14px;
  color: #666;
  line-height: 1.5;
}

/* Loading State */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* Responsive */
@media (max-width: 480px) {
  .page-title {
    font-size: 28px;
  }
  
  .btn-create {
    font-size: 16px;
    padding: 14px 20px;
  }
  
  .event-card {
    padding: 16px;
  }
  
  .modal-content {
    border-radius: 16px 16px 0 0;
  }
}